Screw shaving and slotting machine



Sept. 13, 1932. F. E. NEWTON 1,877,632

I SCREW SHAVING AND SLOTTI NG MACHINE Filed May 29. 1931 Sheets-Sheet 1 Sept. 13, 1932. F. E. NEWTON SCREW SHAVING AND SLOTTING MACHINE Filed May 29, 1951 2 Sheets-Sheet 2 Patented Sept. 13, 1932 UNITED STATES or'rios l mam; E. newton, or entrees, cosmetics:

soREw snAv-me' AND secretive Mamma- Application filed May 29, 1931. Serial No. 540,934.

This invention relatesmore particularly to Fastened to the shaft and therewith the type of machines which have two rotatais asl eeve'2 with arms 8 which carry rotatable ble chuck spindlesthat are mourited on -an spindles that are provided-with chucks 5. intermittently rotated shaft,.the blanks being and pulleys 6 by means of whiclr the spindles fed to a chuck oarriedby the spindle that is are rotated: When the spindles are in one in the position in which the heads are shaved, position the bla'nl zs 7 i which the chucks carry then given a half revolution with that spindle are. presented to a shaving tool 8', when to a position in which the heads are slotted in theother position the hlanks are presented and then given a half revolution back to sha'v- V to a saw Q b'y which they are slotted, Fig, 1. 13:3 ing position in which the burrs caused by the Fastened to the shaft are a drive disk- 1 60 slotter are removed and the blanks disand an index disk 11. I Turningloosely on the h d. shaft is asleeve 1 2that has a tooth'edsegmeiit The object of the invention is to provide 1 3and an arm 14. Adjustably secured to th means for so controlling the turningmoveouter end ofthis arnris a pawl 15; that is Psments of the shaft which carries the spindles designed to engage the shoulders 16 on the 65 that the machine may be operated very rapidper phery of the drive disk 1O ly and produce accurate blanks with amini- Meshingwith the segment 13 is a toothed mum expenditure ofpower and small wear Segment 1 7 on a lever 18 that is pivoted" on a on the controlling members. stud 19 whlch' s supported at the rear of the 26 In attaining this object brakingmeans are .machiiie frame. The segment lever 18 has 70 arranged so as to be applied to the shaft near apr e ting boss 20 that rides on the cam 21 the end of each semi-revolutionary move- 7 0n the'periphery of the cam disk 22 whioh'is ment, in such manner as to gradually overfastened to the main'carn shaft23 ofthema come the momentum of the rapidly revolved chine. The rotation'of this cam through the 'ffiheavy spindles and'their supporting and romedium of the lever and intermeshing tating means, as they finish their movements, toothed segments, at the required intervals,

and ensure the engagementofthe positive incauses the pawl 15 toengagethe shoulder 16 dexing means, without applying friction to and turn the drive disk and the shaft 180, the shaft during its entire rotation, thus enand then return. A l I abling the machine to be operated faster with Adapted to engage notches 2 k in the, pe- 80 fewer defective blanks and-with lessdriving riphe y ofthe index disk l l is a tooth 25, on

ower and destructive wear on theparts, than the endpf a; lever 26 which is mounted onia with the previously constructedmachines of stud 2'] fastenedto the frame. 1A spring 28 thi ty t I 7 connected between the outer endof this lever 85 In the accompanyingdrawings Fig. 1 and the frame tends to hold the toothjin en- 85 shows a plan of so much ofa screw shaverand gagementwith the periphery of the index slotter of the type referred to as is necessary disk 11. The inner end of this lever has to an understandingof the present invention. shoe 2% that is adapted to be e'ngagedby the Fig.2 shows an end elevation of the-same. end offa cam block 30 which is adjustably 40 Fig. 3 shows-a transverse-section on the plane fastened to the cam disk 22. This cam block indicated by the dotted line 3-3ion Fig. 1', at the proper intervals engages the lever, 26 with the parts in'one position. Fig; 4 shows andwithdraws the tooth'25 'frorn anotch in a transversesection on the same plane'- with the periphery of theindexdisk so thatthe the partsin adifi'erent position. Fig; 5shows pawl 15 may rotate the. drive disk and shaft. the clutch with thecoverplate-removednFig. Atthe "end of he push of the pawl the spring 95 6 shows an edge view of the drive disk and 28-.pul-lsj th'e leveriso that the tooth willprothe index-1 disk. V Fig. 7 'showsa face view of je into a no c du p the i so e the drive and index disks. e I shaft with the spindles in proper position Theshaft-1 is rotatably supported in the The mechanism described causes a very usual manner common to these machines. rapid rotation of the shaft and consequently parts which it carries ting machine gives the spindles a quick revolving move-means for imparting intermittently rotary ment, and previously it frequently happened that, owin to the speed and momentum of the parts, t e index tooth would not enter the notch of the index disk and the shaft would turn too far thus disturbing the timing relations of the mechanisms and producing defective articles. To overcome this and ensure the entry of the tooth into the notch of the disk, without applying excessive resistance in order to overcome the momentum ofthe spindles, their supports and the shaft, the female member 31 of a split ring clutch is fastened to the shaft While the male member 32 of the clutch is held from rotation by an arm 33 which is mounted on the stud 19. Between theseclutch members is an expansion ring 34 the sections of which at the proper time are spread by the oblong inner end of a stud 35 that projects through the fixed member of the clutch and between the ends of the split ring. This expansion stud has a projecting stem 36 that is drawn down by a spring 37 connected with the arm 33 which holds the non-rotating clutch member, so as to normally hold the clutch free. Adjustably fastened to the segment lever 18 is an arm 38 with a projecting stud 39 which carries a roll 40 in the plane of the clutch stem 36.

his arm is so adjusted that as the segment nears the end of its upward movement, the

roll 40 will engage the stem 36 and turn the This causes the expansion of the clutch ring so that the clutch will slow down the rotation of the shaft as it approaches the completion of its rotary movement and stop the shaft at the right time. This braking of the rotation of the shaft relieves the parts of the pound or jar which would result from the inertia of the revolved spindles if they were stopped suddenly,

and also slows down the shaft near the end of its movement in such manner that the tooth which indexes the rotatory members will surely enter a notch in the index disk and hold the shaft and the in exact position for the tools to properly act upon the blanks held by the chucks carried by the spindles.

The invention claimed is:

1. In combination with a shaving and slotting machine which has a rotatory shaft carrying rotatory stock-holding spindles, means for imparting intermittently rotary movements to the shaft, means for lockin said shaft in exact position at the-end 0 each movement, braking means for'slowing down and stopping the rotatory movement of the shaft, and means engaged by the means for imparting said intermittently rotary move- "ments to the shaft for applying said braking -means as the shaft approaches the limits of its rotatory movements.

2. In combination with a shaving and slotwhich has a rotatory shaft carrying rotatory stock-holding spindles,

movements to the shaft, means for locking said shaft in exact position at the end of each movement, a friction clutch with one member attached to said shaft, and means for closing said clutch as the shaft approaches the limits of its rotatory movements.

3. In combination with a shaving and slottingmachinewhich has a rotatory shaft carrying rotatory stock-holding spindles, means for imparting intermittently rotary movements to the shaft, means for locking said shaft inexact position at the end of each movement, braking means for slowing down and stopping the rotatory movement of theshaft, and means actuated by the shaft rotating means for applying said braking means as the shaft approaches the limits of its rotatory movements.

4. In combination with a shaving and slotting machine which has a rotatory shaft carrying rotatory spindles, a ratchet wheel and pawl for imparting intermittently rotary movements to the shaft, means including tooth segments and a cam for oscillating said pawl, means for locking said shaft in exact position at the end of each movement, said locking means being released by the action of said cam, braking means for slowing down and stopping the'rotatory movement of the shaft, and means carried by one of said segments for applying said braking means as the shaft approaches the limits of its rotatory movements.

5. In combination with a shaving and slotting machine which has a rotatory shaft carrying rotatory spindles, a ratchet wheel and pawl for imparting intermittently rotary movements to the shafts, means'including toothed segments and a-cam for oscillating said pawl, means for locking said shaft inexact position at the end of each movement, said locking means being released by the action of said cam, a friction clutch with one member attached to said shaft, and means carried by'the pawl oscillating means for closing said clutch as the shaft approaches the limits of its rotatory movements.

6. In combination with a shaving and slotting machine which has a rotatory shaft carrying rotatory spindles, a ratchet wheel and pawl for imparting intermittently rotary movements to the shaft, toothed segments and a cam foroscillating said pawl, lever for locking said shaft in exact position at the end of each movement, a spring for causing the engagement of said locking means, means on said cam for causing the release of said'locking means, a friction clutch with one memberrotatable with the shaft and a member held against rotation, and an arm movable with'said toothed segments for closing said clutch as the shaft approaches the limits of its rotatorymovements.

a toothed 7. In combination a rotatory shaft having a ratchet disk, a notched index disk and a clutch member fixed on the shaft and a toothed segment loose on the shaft, a pawl carried by said segment for engaging the ratchet disk, a lever With a tooth engaging the index disk, a fixed clutch member concentrio with the shaft, an oscillatory toothed segment engaging the segment on the shaft, a cam for oscillating said segments, means on said cam for disengaging said toothed lever from the index disk, and means on said second mentioned segment for causing the engagement of said clutch members as the shaft approaches the limits of its rotatory movements. 7

FRANK E. NEWTON. 

